Gas mixer



1,613,388V Jam 4 1927' F. w. GAULT, JR A GAS MIXER Filed Oct. 22, 1925 all.. l l l Z5 jim:

Patented Jan. 4, 1927.

Uhlllli i Lenses FRANK W. GAULT, JR.,` OF LOUISVLLE, KENTUCKY, ASSGNOR GF T H. J. GREIVE, OF LOUSVILLE, KENTUCKY.

GAS IVIIXER.

Application filed October 22, 1925. Serial No. 24,131.

This invention relates to an imlgrovcinent in mixing chambers for gas burners` ior use in connection with gas burners tor furnaces7 heat engines ot' the rotary and reciprocating types, and similar constructions wherein gas burners are employed t'or heating' purposes.

T his invention onsists olf a mixing chamber made in sections and provided with a removable centrally located perforated tube. A compressed air nozzle is connected to the mixing chamber and dcliif'ei's con'ipresf-fed air through the tubular diaphragm and discharges it tothe burner nozzle connected on the opposite side ot the chamber, and gas is admitted to the mixing chamber and drawn or sucked into the tubular diaphragm by the compressed air, whereby the gas, and compressed air are mixed together and delivered to the burner nozzles. An automatic control iis provided for regulating the amount of atmospheric Yair delivered to the mixing chamber which is governed Vin its operation by the amount ot' compressed air delivered to the mixing chamber.

The invention consists ot ertain novel features ot construction and combination of parts which will be hereinafter described and pointed out in the claims.

In the accompanying drawings:

Figure l is a view in side elevation of the invention showing the manner of delivering gas and compressed air to the mixino' chamber.

figure 2 is a vertical sectional view.

The mixing chamber consists of upper and lower sections 10 and 11 connected together by means of a ring 12 loosely mounted upon the lower section 11 and having screw-threaded engagement with the external wall of the upper section 10.

Connected to the upper section 10 and preferably centrally thereotl is a nipple 13 which is `held in its adjusted position by means ot a lock nut 14, the nipple 13, having screw-threaded `engagement with section 10. A burner nozzle 15 has screwthreaded connection with the nipple 13, and mounted upon the burner nozzle 15 is a shell 16. Gas is admitted to the mixing chamber through the upper section 10V by means of pipes 17, 17 which are provided with valves 13, 18 forregulating the supply and the pipes' 1'?i l? connected. to a gas supply pipe la Connected to the lower section ll is Va casing or housing 20 provided with openings 2l, 21 in the bottoni thereof, for admitting atmospheric air to the mixing chamber tlnough air ports 22, 22 in the bottom ot the lower section 11. The air openingsQl7 2l. of the casing 2() are normally closed by a disk valve mounted in the casing and held over the openings by means ot studs 24, 2li connected to the valve and extending through the bottoni oit-the casing. Springs 25 encircle the studs 24 and bear against the heads ot the studs 241 and bottom of the casing lor normally holding the valve E234 over the openings 21 to prevent the ingress or' air to the mixing chamber.

The casing is also provided with a plurality of openings 26 for admitting air to the casing and mixing chamber. The admission ot air through the casing and open- 2G is controlled by manually operable ring shaped valve 27 which has ports 28 therein adapted to be brought into registry with openings 26. This valve 27 is held in adjusted position by means of a wing nut 29 which extends through a slot'in the ring valve and has screw-threaded engagement with the casing 20.

The air casing 2O is provided with aV centrally downwardly extending tubular extension 30 which is internally screw-threaded for engagement with the external screw-V threads ot the compressed air nozzle 3l. The nozzle 31 is adjustably supported in Y the tubular extension 30 and held in position by a lock nut 32 mounted thereon andadapted to engagethe lower end ot the tubular extension 30. A central opening 33 is formed i in the bottom of the lower section 11'in alinement with the opening Vin section 10 to which the nipple 13 is connected for the insertion oit the air nozzle 31 into and from the mixing chamber ot sections 10 and 11.

The compressed air nozzle 3l is connected by a pipe 34 to a compressed air supply. rl`he admission of air through the pipe tothe nozzle is controlled by a valve `35.

Mounted within the mixing chamber and between sections 1Q and 11 is a tubular diaphragm 36 the bore of which is in alinement with the opening 33 of section 11and the openingin section 10 for the nipple `13 so that-the blast of air from the nozzle 31 will be discharged directly through theinxng chamber inte the nipple The :la:

lll

livery ot compressed air through the nozzle 31 to the mixing chamber will draw the gas delivered to the mixing chamber through pipe 17 into tubular diaphragm 236 through ports or holes 37, 37 located in the diaphragm t'ivhere the gas will be mixed with the compressed air and discharged through the nipple 13 to the burner nozzle 15.

In starting. the burner the ring valve Q7 Will be adjusted for adn'iitting the necessary amount of air o1 atmosphere to the mixing` chamber Where it will commingle with the gas delivered thereto by pipe 17 andthe air and gas will be drawn vinto the tubular dia- 0*' phragm through the ports i by the compressed air delivered through the nozzle 3l. After thegas has been ignited by this supply of air through the ring valve 27 Will be cut ott' and the amount oi atmospheric air delivered to the mixing chamber to commingle with the gas and compressed air will be governed by the suction created by the compressed air delivered to the diaphragm 36. T he compressed air will create sutlicient suction to dranv the .gas into the diaphragm and to yelevate the disk valve 33 against the tension ot the springs 34 to admit the necessary quantity ot' atmospheric air to the mixingl chamber to provide the proper combustion of the ygas and create intense heat.

From the foregoing it will be seen that the gas and atmospheric air are drawn into the tubular diaphragm due to the suction created therein by the supply oi compressed air which is governed by the valve 35, thereby Vproviding automatic means Ylor regulating the mixture of atmospheric air and and compressed air that is to be delivered tofth'e burner.

Having described Athe invention7 What is claimed is z- 1. The combination of a sectional mixing chamber having intake and outlet openings, a tubular pcrtorate diaphragm mounted in the mixing chamber and having the bore thereof in alinement with the 4intake and outlet openings, means for connecting the sections ol the mixing' chambers together and holding the diaphragm in position. means for delivering gas to the mixing chamber' and a compressed air nozzle supported by the mixing chamber and arranged in alinement with the intake opening Afor deliveringcompressed air to the diaphragm.

i3. The combination of a mixing chamber having intake and outlet openings. a perlorate tubular diaphragm mounted in the mi-xing chamber and hav'in'g'the bor-e thereot in alinement with theinta'ke and outlet openings, means fordelivering gas to the mixing chamber and a compressed air nozzle supported by the mixing chamber and arranged in alin'ement with thev intake Vopening tor Leiase delivering compressed air to the tubular diaphragm, and burner nozzle connected to the out-let opening ol" the mixing chamber.

The combination ot' a mixing' chamber having intake and outlet-openings, a tubular perforate diaphragm located in the mixing chamber, means for delivering 0as to the mixing chamber at one side ot the diaphragm, means for delivering compressed air to the mixing chamber through the intake opening tor drawing the gas through the diaphragm and mixing it With the compressed air and delivering the gas and eompressed air through the outlet opening and a burner nozzle connected to the outlet opening` ot the mixing chamber.

l. The combination ot a mixing chamber having intake and outlet openings, a tubular perforate diaphragm located in the mixing chamber, lmeans for delivering gas to the mixing chamber at one side ot the diaphragm, means tor delivering compressed air to the mixing chamber through the intake opening tor drawing the gas through the diaphragm and mixing it with the compressed air and delivering the compressed air and gas through the outlet opening7 said mixing chamber having air inlet openings and a valve for controlling the supply ot afir through said air inlet openings said valve being actuated by the compressed air passfng through the mixing chamber.

The combination of a mixing chamber having intake and outlet openings. a tubular pertorate diaphragm mounted in the mixing chamber and having the bore thereo'l in alinement with the intake and outlet openings, means for deliveringgas to the mixing rhamber and a compressed air nozzle supported by the mixing chamber and arranged in allinement with rthe intake opening for delivering compressed air to the diaphragm, said mixing chamber having air inlet openings and -a valve for controlling the supply ot air ythrough said air inlet openingsy said valve being actuated by the compressed air passing through the mixing chamber.

6. The combination ot' a mixing chamber having intake and. outlet openings, means for delivering gas to the mixing-chamber, means lor delivering compressed air to the mixing chamber through the .intake opening.I said mixing chamber provided vrwith 'air inlet ports7 a casing` 'mounted onthe mixing chamber surroundingthe-air inlet ports and provided with openings vl'or admitting air into the casing anda spring controlled -valver FRANK TV. 'GAUL'L Jn. 

